Slave cylinder for a centered clutch release system

US6244409A · kind A · utility

Assignee

• LUK Lamellen Und Kupplungsbau · US

Inventors

• Ludwig Winkelmann · Erlangen, DE
• Gerhard Meyer · Lehrberg, DE
• Bernd Liebezeit · Bad Wildbad, DE
• Gerhard Prosch · Edenkoben, DE

Key dates

• Filing date: Oct 21, 1999
• Grant date: Jun 12, 2001
• Expiry date: Oct 21, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16D25/083
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulically operated central release unit for a motor vehicle clutch is designed as a slave cylinder that is arranged inside a clutch housing. The central release unit includes a housing in which a ring piston is movably guided. The ring piston has a groove ring seal with lips sealingly contacting the sealing tracks. To reduce the wear on the sealing lips and to avoid squeaking noises of the groove ring seal, the surfaces of the sealing tracks are provided with micro cavities.